Mac OSX 10.5.3
Java 1.6 framework
Apple's Framework info...
Version: 12.1.0
Last Modified: 5/6/08 7:39 AM
Location: /System/Library/Frameworks/JavaVM.framework
If multiple editor windows are visible, the caret blinks in both of them. There should be no active-looking caret
displayed in a window that does not have focus.
Related: When running a single unit test using shift-F6 focus shifts to the unit test results window, but the caret
continues to blink in the editor window. The use-case here is -probably- one where the user wishes to make an edit, run
the test, and continue editing base on what is observed in the results window. Switching focus just because the test
was run breaks this, and is worsened by the fact that the blinking caret suggests you can keep editing.

Yet another focus related problem on Mac OS X. I'm sorry this is most likely a JDK problem and there is not much we can
do about it in Netbeans.
*** This issue has been marked as a duplicate of 90371 ***